US3768747A - Cartridge takeup core and core-mounting system - Google Patents

Cartridge takeup core and core-mounting system Download PDF

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Publication number
US3768747A
US3768747A US00234794A US3768747DA US3768747A US 3768747 A US3768747 A US 3768747A US 00234794 A US00234794 A US 00234794A US 3768747D A US3768747D A US 3768747DA US 3768747 A US3768747 A US 3768747A
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US
United States
Prior art keywords
core
cartridge
end wall
spindle
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00234794A
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English (en)
Inventor
E Edwards
R Sutliff
A Tucker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
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Eastman Kodak Co
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Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
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Publication of US3768747A publication Critical patent/US3768747A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/28—Locating light-sensitive material within camera
    • G03B17/30—Locating spools or other rotatable holders of coiled film
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/26—Holders for containing light-sensitive material and adapted to be inserted within the camera
    • G03B2217/261—Details of spools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S242/00—Winding, tensioning, or guiding
    • Y10S242/914—Special bearing or lubrication

Definitions

  • ABSTRACT An improved gear-driven molded takeup core and mounting means therefor for use in a doublechambered film cartridge is disclosed.
  • the instant invention is characterized by a takeup core design which allows the molding of a core having improved dimensional tolerances and, in addition, facilitates a core mounting arrangement which provides improved core support not only when the cartridge is disassembled during cartridge spooling operations, but also during use of the cartridge in a camera.
  • the instant invention relates to double-chambered film cartridges and, in particular, to an improved cartridge takeup core and means for mounting such core in a cartridge takeup chamber.
  • Such a mounting arrangement may not, however, be suitable for use with all types of cartridges.
  • a different arrangement is required when the aforementioned opposed cartridge end walls are not part of a common structural member (as in the above example) but are, instead, defined by discrete cartridge members.
  • Such cartridge members must be separated to permit insertion of a roll of film into the cartridge supply chamber during spooling operations and, while separated, the members are incapable of simultaneously supporting the respective ends of the core so that an end of a photosensitive web may be attached to the core.
  • a core-mounting arrangement may advantageously comprise an elongated spindle connected to only one of the cartridge side walls; a hollow takeup core may than be dropped onto the spindle and supported thereon during spooling even though the cartridge is disassembled.
  • a core mounting spindle carried by one sidewall of the cartridge takeup chamber.
  • the spindle has a distal end that telescopically receives, and is in turn similarly received by, a cartridge takeup core so as to lend support to the core during spooling operations.
  • the core itself telescopes with a core support pin carried by the opposite sidewall so as to provide improved core support during use of the cartridge in a camera.
  • Such telescoping core design further provides, in cooperation with an annular light lock pocket, a core having a cross-sectional configuration of substantially uniform thickness so as to facilitate the core molding process.
  • FIG. 1 depicts an assembled cartridge embodying the subject invention.
  • FIG. 2 is an exploded view of the cartridge shown in FIG. 1.
  • FIG. 3 is a partial cross-sectional view taken along line 33 of FIG. 1.
  • FIG. 4 depicts, in a cross-sectional view similar to FIG. 3, a spindle-type core support arrangement known in the prior art.
  • FIG. 1 depicts an assembled film cartridge 11 having a generally cylindrical supply compartment 13 spaced from and interconnected with a generally cylindrical takeup compartment 15.
  • a photographic web comprised of a photosensitive film strip either along or in combination with a light-impervious backing material strip is removed from the supply compartment 13, transported past an exposure area 17, and re-wound within the takeup compartment 15.
  • Cartridge 11 comprises three discrete structural members as shown in FIG. 2: a cartridge body 19, a cartridge cover 21, and a takeup core 23.
  • Body 19 defines a generally cylindrical takeup compartment peripheral wall 25 and a generally planar first end wall 27 which is attached to wall 25 so as to enclose one end of the takeup compartment 15.
  • a core support spindle 29 has a generally conical configuration to facilitate extraction of the spindle from a mold.
  • Spindle 29 also has a distal end 3% and is attached at its opposite, or base, end to end wall 27.
  • Spindle 29 extends from wall 27 toward the opposite end of compartment 15 in generally coaxial alignment with the central axis of compartment 15.
  • Takeup core 23 includes a core gear 31 and an exterior wall 48 defining conical central recess 33 (see FIG. 3) within which recess the spindle 29 can be received so that the core may be rotatably driven with respect to spindle 29 by a drive gear 35 (FIG. 3) carried by a camera.
  • the opposite, or second, end wall 37 of the takeup chamber is formed by the cartridge cover 21 and includes a raised gear cover portion 37' for receiving the core gear 31.
  • An access opening 38 formed in gear cover wall portion 37' permits the camera drive gear 35 to enter into driving engagement with core gear 31.
  • the second end wall 37 generally opposes the first end wall 27 with the peripheral wall 25 extending therebetween; and the spindle 29 is disposed with its distal, or smaller end, closer to (but out of contact with) the second end wall 37 than to the first end wall 27, as shown in FIG. 3.
  • the distal spindle end 39 is designed to receive, and be in turn received by, cartridge core 23 in a telescoping arrangement.
  • the spindle end 39 includes a radially disposed circular spindle end wall 41 generally opposing the gear cover wall portion 37.
  • Anannular core support wall 45 completely bounds spindle end wall 41 and projects toward wall portion 37 so as to form an effective extension of a main spindle wall 30.
  • support wall 45 is received within an annular well 47 formed in the end portion of core 23 and defined in part by concentric annular core wall portions 48 and 49.
  • Well 47 is so sized with respect to the wall 45 that the wall 45, when received concentrically therewithin, (as when the cartridge is in its assembled state) will be out of contact with those surfaces of core 23 which define the well 47. Needless frictional contact between the core and the spindle is thereby reduced when the cartridge is in an assembled state.
  • cartridge cover 21 which carries the second compartment end wall 37
  • the core 23 is free (as will later be described) to drop down so that at least edge A of core wall 48 rests upon spindle wall 45.
  • core edge B may rest upon a portion of the main spindle wall 30. In this manner core 23 forms at least two simultaneous line contacts with spindle 29 when cover 21 is removed.
  • a generally cylindrical core bearing pin 52 carried by wall portion 37' is itself closely received within the bearing cup when the cartridge is assembled.
  • the cylindrical outer surface of the pin 52 serves as a bearing to maintain drive gear 31 in concentric relation with gear cover 37 so as to prevent the core from binding within the takeup compartment and, in particular, to prevent the gear teeth from rubbing against the internal surface of cover 37 when the cartridge is in use in a camera.
  • annular wall 49 includes, at one end, a first thrust bearing 53 in the form of an annular raised ridge disposed to form substantially a line contact with spindle end wall 41.
  • a similar arrangement is provided at the opposite end of wall 49 in the form of a second thrust bearing 55 defined by an annular ridge which extends slightly outward from the outer face 32 of gear 31 so as to form substantially a line contact with gear cover portion 37.
  • a relatively deep annular pocket 57 is formed in takeup core 23 in concentric radially spaced relation with well 47.
  • a bevelled light lock ridge 59 carried by wall 37 generally opposes pocket 57 to form, in combination therewith a labrinthine light lock.
  • light which may, for example, enter through gear access opening 38 is not only forced to follow a tortuous path around ridge 59, but is also ef' fectively absorbed within the deep confines of recess 57 and is prevented from reaching the web 58.
  • the design of core 23 facilitates core molding operations by avoiding excessively thickened core wall areas.
  • the prior art cartridge design depicted in FIG. 4 even through it does employ a spindle to support a cone 101, exhibits a substantial variation in radial core thickness throughout. Note, for example, the disparity in radial core thickness as measured along radial line X with regard to that measured along line Y.
  • the instant invention has a substantially uniform wall thickness (compare, for example, the thickness of walls 48 and 49).
  • a substantially uniform wall thickness is provided, first of all, by the positioning of annular well 47 approximately midway between the central axis of the core 23 and the outer periphery 61 of gear 31, also, pocket 57 is similarly approximately equidistant radially from well 47 and the peripheral core surface 63.
  • well 47 and pocket 57 serve not only to provide respectively, improved core support and protection from fogging, but also serve to define core walls of relatively uniform thickness.
  • a film cartridge (11) of the type comprising a cartridge body (19) member and a cartridge cover member (21), said cartridge including a generally cylindrical takeup compartment (15) for receiving and storing exposed photosensitive filmstrip (58), said takeup compartment comprising:
  • a second end wall (37, 37') defined by said cover member and generally opposing, in spaced relationship, said first end wall;
  • a generally conical spindle (29) having a base end attached to said first end wall (27 said spindle extending toward said second wall (37, 37') and terminating at a distal portion (39) spaced closer to said second end wall than to said first end wall;
  • said distal end of said spindle includes a spindle end wall (41) generally opposing said second cartridge end wall (37, 37) and an annular core support wall (45) bounding said spindle end wall and extending therefrom towards said second cartridge end wall;
  • said second cartridge end wall includes a core bearing pin (52) extending toward said spindle end wall (41) and centered therewith;
  • said core mounting means comprises:
  • first thrust bearing means for forming substantially a line contact with said spindle end wall 6
  • second thrust bearing means for forming substantially a line contact with said second cartridge end wall (37)
  • bearing cup means for receiving said core bearing pin.
  • takeup core further includes an annular pocket (57) disposed radially outward from and concentrically with respect to said annular well (47).
  • said second cartridge end wall includes means (59) for forming, in combination with said annular recess, a labrinthine light lock.
  • said spindle (29) includes a central recess (43) formed therein and extending from said first cartridge end wall (27) to said spindle end wall (41).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
US00234794A 1972-03-15 1972-03-15 Cartridge takeup core and core-mounting system Expired - Lifetime US3768747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23479472A 1972-03-15 1972-03-15

Publications (1)

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US3768747A true US3768747A (en) 1973-10-30

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US00234794A Expired - Lifetime US3768747A (en) 1972-03-15 1972-03-15 Cartridge takeup core and core-mounting system

Country Status (8)

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US (1) US3768747A (enrdf_load_html_response)
JP (1) JPS493623A (enrdf_load_html_response)
AR (1) AR197889A1 (enrdf_load_html_response)
BE (1) BE796825A (enrdf_load_html_response)
DE (1) DE2312687A1 (enrdf_load_html_response)
ES (1) ES189652Y (enrdf_load_html_response)
FR (1) FR2175939B1 (enrdf_load_html_response)
IT (1) IT981322B (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122823A (en) * 1991-05-13 1992-06-16 Eastman Kodak Company Film cassette loading apparatus in a photographic camera
US6089486A (en) * 1999-04-15 2000-07-18 Eastman Kodak Company Film cartridge with pawl and ratchet
US6283396B1 (en) * 1999-12-02 2001-09-04 Storage Technology Corporation Tape transport using a carrier ribbon with edges
USD468190S1 (en) 2002-01-14 2003-01-07 Melvin R. Kennedy Spool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159357A (en) * 1962-09-14 1964-12-01 Orests B Berlings Photographic film cassettes
US3633842A (en) * 1969-06-19 1972-01-11 Eastman Kodak Co Web takeup device
US3650489A (en) * 1970-04-06 1972-03-21 Eastman Kodak Co Gear drive for a camera and film cartridge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159357A (en) * 1962-09-14 1964-12-01 Orests B Berlings Photographic film cassettes
US3633842A (en) * 1969-06-19 1972-01-11 Eastman Kodak Co Web takeup device
US3650489A (en) * 1970-04-06 1972-03-21 Eastman Kodak Co Gear drive for a camera and film cartridge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122823A (en) * 1991-05-13 1992-06-16 Eastman Kodak Company Film cassette loading apparatus in a photographic camera
US6089486A (en) * 1999-04-15 2000-07-18 Eastman Kodak Company Film cartridge with pawl and ratchet
US6283396B1 (en) * 1999-12-02 2001-09-04 Storage Technology Corporation Tape transport using a carrier ribbon with edges
USD468190S1 (en) 2002-01-14 2003-01-07 Melvin R. Kennedy Spool

Also Published As

Publication number Publication date
FR2175939B1 (enrdf_load_html_response) 1977-02-04
ES189652U (es) 1974-04-01
FR2175939A1 (enrdf_load_html_response) 1973-10-26
AR197889A1 (es) 1974-05-15
IT981322B (it) 1974-10-10
JPS493623A (enrdf_load_html_response) 1974-01-12
DE2312687A1 (de) 1973-09-20
BE796825A (fr) 1973-09-17
ES189652Y (es) 1974-10-16

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